The oxidation states of 239 U formed by the 238 U(n,y) 239 U nuclear reaction have been determined in various solid salts by HPLC. Optimal conditions of separation were obtained with an equimolar (0.125 M) solution of oxalic and nitric acids. U(IV) and U(VI) are eluted within 3.6 and 9 min., respectively.
In the presence of I s , the HT [DT] yield in neutron-irradiated3 He-containing H 2 0 [D,0] (gas) amounts to 15.2% [17.3%]. The yield decreases with the addition of * He and tends to zero for m. f. He = 1. The main source of HT is the hot reaction T^ot + H 2 O ->• HT + OH. Tritiated water, HTO, results from both thermal and hot Τ + H 2 0 -* HTO + Η reactions. Owing to fast isotopie exchange, the respective contributions of these reactions cannot be determined. The enhanced HT yield in the gas phase as compared to the liquid phase is attributed to the dissociative de-excitation of HTO molecules produced by Τ atoms having kinetic energies higher than 7 eV.
O/O des angewandten Ketons; eine weitere Menge liiBt sich als 8 -P h e n y l v a l e r i nn s i i u r e -m e t h y l e s t e r (farbloses 01, Sdp.35 : 173 O) aus den nicht erstarrenden Oxydationsprodulrten des Methyl-6-pheny Ibutyl-ketons abscheiden. 0.2742 g Sbst.: 0.7460 g COs, 0.1950 g HaO. C l l H 1 4 0~. Bar. C 74.11, H '7.92. Gef B 7420, s 7.95. Uber einige andere d-Phenylvalerylketone und ihre Abwandlungen bolfe ich demnlchst berichten zu kiinnen. 537. A. B i e t r s y o k i , J. Paulus und R. Perrin: Die Kondensation von p-&d o-Methoxy-mandels8menitril mit Phenolen und Phenolilthern. 1) B i s t r z p c k i und Flatau, B. 28, 989 [l895]; 30, 1'24 [1897]; Cramer, B. 31, 2813 118981: S i m o n i s , B. 31, 2821 [1898]: von Tymieniecki, Dissertation, Freiburg (Schweiz) [1895]; Thomm e s e n , Dissertation, Freiburg (Schweiz) [1898]. 1) B. 81, 2812 [18983.3) Das Nitril lieferte allerdings eine weit geringere Ausberite an p-Oxysiurc rls die Mandelsiture selbst; vergl. den SchluD dieser Abhandlung.
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